[Rickd]

If I were ordering again, with the TKO 600, I would definitely have gone with the .82 OD and I would have ordered a 3:31 rear rather than the 3:54. I really don't like the .64 with the 3:54 rear. If you are driving a lot in the 60 - 70 mph range, it is a real pain - you want to shift - but that huge drop sucks big time. My old cobra had a T5 with a .75 OD and I had a 3:31 rear - which was a nice combo.